1/*
 2 * Copyright (c) 2001-2005 Silicon Graphics, Inc.
 3 * All Rights Reserved.
 4 *
 5 * This program is free software; you can redistribute it and/or
 6 * modify it under the terms of the GNU General Public License as
 7 * published by the Free Software Foundation.
 8 *
 9 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
17 */
18#ifndef __XFS_ACL_H__
19#define __XFS_ACL_H__
20
21struct inode;
22struct posix_acl;
23struct xfs_inode;
24
 
25#define XFS_ACL_NOT_PRESENT (-1)
26
27/* On-disk XFS access control list structure */
28struct xfs_acl_entry {
29	__be32	ae_tag;
30	__be32	ae_id;
31	__be16	ae_perm;
32	__be16	ae_pad;		/* fill the implicit hole in the structure */
33};
34
35struct xfs_acl {
36	__be32			acl_cnt;
37	struct xfs_acl_entry	acl_entry[0];
 
 
 
 
38};
39
40/*
41 * The number of ACL entries allowed is defined by the on-disk format.
42 * For v4 superblocks, that is limited to 25 entries. For v5 superblocks, it is
43 * limited only by the maximum size of the xattr that stores the information.
44 */
45#define XFS_ACL_MAX_ENTRIES(mp)	\
46	(xfs_sb_version_hascrc(&mp->m_sb) \
47		?  (XATTR_SIZE_MAX - sizeof(struct xfs_acl)) / \
48						sizeof(struct xfs_acl_entry) \
49		: 25)
50
51#define XFS_ACL_MAX_SIZE(mp) \
52	(sizeof(struct xfs_acl) + \
53		sizeof(struct xfs_acl_entry) * XFS_ACL_MAX_ENTRIES((mp)))
54
55/* On-disk XFS extended attribute names */
56#define SGI_ACL_FILE		(unsigned char *)"SGI_ACL_FILE"
57#define SGI_ACL_DEFAULT		(unsigned char *)"SGI_ACL_DEFAULT"
58#define SGI_ACL_FILE_SIZE	(sizeof(SGI_ACL_FILE)-1)
59#define SGI_ACL_DEFAULT_SIZE	(sizeof(SGI_ACL_DEFAULT)-1)
60
61#ifdef CONFIG_XFS_POSIX_ACL
62extern struct posix_acl *xfs_get_acl(struct inode *inode, int type);
63extern int xfs_set_acl(struct inode *inode, struct posix_acl *acl, int type);
 
64extern int posix_acl_access_exists(struct inode *inode);
65extern int posix_acl_default_exists(struct inode *inode);
 
 
 
66#else
67static inline struct posix_acl *xfs_get_acl(struct inode *inode, int type)
68{
69	return NULL;
70}
71# define xfs_set_acl					NULL
 
72# define posix_acl_access_exists(inode)			0
73# define posix_acl_default_exists(inode)		0
74#endif /* CONFIG_XFS_POSIX_ACL */
75#endif	/* __XFS_ACL_H__ */

 1/*
 2 * Copyright (c) 2001-2005 Silicon Graphics, Inc.
 3 * All Rights Reserved.
 4 *
 5 * This program is free software; you can redistribute it and/or
 6 * modify it under the terms of the GNU General Public License as
 7 * published by the Free Software Foundation.
 8 *
 9 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
17 */
18#ifndef __XFS_ACL_H__
19#define __XFS_ACL_H__
20
21struct inode;
22struct posix_acl;
23struct xfs_inode;
24
25#define XFS_ACL_MAX_ENTRIES 25
26#define XFS_ACL_NOT_PRESENT (-1)
27
28/* On-disk XFS access control list structure */
 
 
 
 
 
 
 
29struct xfs_acl {
30	__be32		acl_cnt;
31	struct xfs_acl_entry {
32		__be32	ae_tag;
33		__be32	ae_id;
34		__be16	ae_perm;
35	} acl_entry[XFS_ACL_MAX_ENTRIES];
36};
37
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
38/* On-disk XFS extended attribute names */
39#define SGI_ACL_FILE		(unsigned char *)"SGI_ACL_FILE"
40#define SGI_ACL_DEFAULT		(unsigned char *)"SGI_ACL_DEFAULT"
41#define SGI_ACL_FILE_SIZE	(sizeof(SGI_ACL_FILE)-1)
42#define SGI_ACL_DEFAULT_SIZE	(sizeof(SGI_ACL_DEFAULT)-1)
43
44#ifdef CONFIG_XFS_POSIX_ACL
45extern struct posix_acl *xfs_get_acl(struct inode *inode, int type);
46extern int xfs_inherit_acl(struct inode *inode, struct posix_acl *default_acl);
47extern int xfs_acl_chmod(struct inode *inode);
48extern int posix_acl_access_exists(struct inode *inode);
49extern int posix_acl_default_exists(struct inode *inode);
50
51extern const struct xattr_handler xfs_xattr_acl_access_handler;
52extern const struct xattr_handler xfs_xattr_acl_default_handler;
53#else
54static inline struct posix_acl *xfs_get_acl(struct inode *inode, int type)
55{
56	return NULL;
57}
58# define xfs_inherit_acl(inode, default_acl)		0
59# define xfs_acl_chmod(inode)				0
60# define posix_acl_access_exists(inode)			0
61# define posix_acl_default_exists(inode)		0
62#endif /* CONFIG_XFS_POSIX_ACL */
63#endif	/* __XFS_ACL_H__ */